Hypertext Webster Gateway: "isomerism"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Isomerism \I*som"er*ism\, n. (Chem.)
The state, quality, or relation, of two or more isomeric
substances.
{Physical isomerism} (Chem.), the condition or relation of
certain (metameric) substances, which, while chemically
identical (in that they have the same composition, the
same molecular weights, and the same ultimate
constitution), are yet physically different, as in their
action on polarized light, as dextro- and l[ae]vo-tartaric
acids. In such compounds there is usually at least one
unsymmetrical carbon atom. See {Unsymmetrical}.
From WordNet (r) 1.7 (wn)
isomerism
n : the state of being an isomer; the complex of chemical and
physical phenomena characteristic of isomers
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